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lua-lsm: lazily allocate task and object dictionary state #27

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lua-lsm: lazily allocate task and object dictionary state #27

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917f69e
lua-lsm: lazily allocate task blob state
chenzongyao200127 Jul 17, 2026
d4e3edb
lua-lsm: initialize object dictionaries lazily
chenzongyao200127 Jul 20, 2026
b67d62f
lua-lsm: allocate object dictionaries lazily
chenzongyao200127 Jul 20, 2026
08e2823
lua-lsm: reorganize lsm header
chenzongyao200127 Jul 20, 2026
7e3d971
lua-lsm: return nil for empty lazy kvcache reads
chenzongyao200127 Jul 20, 2026
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28 changes: 17 additions & 11 deletions security/lua/kvcache.c
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Original file line number Diff line number Diff line change
Expand Up @@ -62,7 +62,7 @@ static int kvcache_node_cmp(struct kvcache_node *n1, struct kvcache_node *n2)

RB_GENERATE_STATIC(kvcache, kvcache_node, node, kvcache_node_cmp);

static void __kvcache_dict_init(struct kvcache_dict *dict)
static void kvcache_dict_init(struct kvcache_dict *dict)
{
rwlock_init(&dict->lock);
RB_INIT(&dict->root);
Expand Down Expand Up @@ -111,7 +111,7 @@ static int kvcache_dict_init_once(struct kvcache_dict *dict)
*/
if (atomic_try_cmpxchg(&dict->state, &state,
KVCACHE_DICT_INITING)) {
__kvcache_dict_init(dict);
kvcache_dict_init(dict);
atomic_set_release(&dict->state, KVCACHE_DICT_READY);
goto out_bh;
}
Expand Down Expand Up @@ -549,13 +549,6 @@ void kvcache_dict_free(struct kvcache_dict *dict)
WARN_ON(atomic_read(&dict->count) != 0);
}

void kvcache_dict_init(struct kvcache_dict *dict)
{
atomic_set(&dict->state, KVCACHE_DICT_INITING);
__kvcache_dict_init(dict);
atomic_set_release(&dict->state, KVCACHE_DICT_READY);
}

/******************************** object cache *******************************/

const int _module_sentinel;
Expand Down Expand Up @@ -592,8 +585,10 @@ int lua_object_get(lua_State *L, struct kvcache_dict *dict)
{
struct lua_lsm_module *module;

if (!dict)
return 0;
if (!dict) {
lua_pushnil(L);
return 1;
}

module = module_from_object_fenv(L, 1);
if (!module)
Expand All @@ -605,6 +600,9 @@ int lua_object_incr(lua_State *L, struct kvcache_dict *dict)
{
struct lua_lsm_module *module;

if (IS_ERR(dict))
return kvcache_result(L, PTR_ERR(dict));

if (!dict)
return kvcache_result(L, -ESRCH);

Expand Down Expand Up @@ -660,6 +658,9 @@ int lua_object_newindex(lua_State *L, struct kvcache_dict *dict)
{
struct lua_lsm_module *module;

if (IS_ERR(dict))
return kvcache_result(L, PTR_ERR(dict));

if (!dict)
return kvcache_result(L, -ESRCH);

Expand Down Expand Up @@ -715,6 +716,11 @@ static int shdict_tostring(lua_State *L)
struct kvcache_dict *shdict = toshdict(L, 1);
unsigned long flags;

if (!kvcache_dict_ready(shdict)) {
lua_pushfstring(L, "shdict (%d / %d)", 0, CACHE_CAPACITY);
return 1;
}

read_lock_irqsave(&shdict->lock, flags);
lua_pushfstring(L, "shdict (%d / %d)",
atomic_read(&shdict->count), shdict->capacity);
Expand Down
1 change: 0 additions & 1 deletion security/lua/kvcache.h
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Original file line number Diff line number Diff line change
Expand Up @@ -58,7 +58,6 @@ void kvcache_stats_show(struct seq_file *m);

int kvcache_module_nodes_gc(struct lua_lsm_module *module);
void kvcache_dict_free(struct kvcache_dict *dict);
void kvcache_dict_init(struct kvcache_dict *dict);

/******************************** object cache *******************************/

Expand Down
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